Submarines: Project 75 & Project 75(I)

Submarines underpin India’s maritime deterrence and sea denial under the SAGAR vision (Security and Growth for all in the Region). India is modernising its conventional fleet through Project-75 (six Kalvari-class submarines built at Mazagon Dock Shipbuilders Limited with technology transfer) and Project-75(I) to construct six AIP-equipped submarines in India under the Strategic Partnership model, aligned with Aatmanirbhar Bharat vision.

Basics Concepts

  • A conventional (diesel-electric) submarine uses diesel engines to charge batteries at or near the surface (via snorkel) and operates silently on battery power when submerged.
  • Stealth is achieved by minimising acoustic, magnetic and infrared signatures, while SONAR enables detection, tracking ....
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